Coffee grinder
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Solution Overview
Problem
Existing coffee grinders suffer from issues such as retention of stale ground coffee beans, inconsistency in coffee dosage, and overheating due to motor placement, leading to suboptimal coffee extraction and flavor.
Innovation Solution
A coffee grinder design featuring a conical burr mechanism with vertical discharge of ground coffee beans, a motor positioned above the burrs to distribute weight evenly and isolate heat, and a heat extraction assembly to manage temperature, along with a scale for accurate dosing and adjustable burr settings for particle size control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the motor is located directly below the blades, then the structure is compact, but the coffee beans and ground coffee overheat due to motor heat
Solution Approach 1:
The motor is extracted from its conventional position directly below the burrs and relocated to the upper portion of the housing. This spatial separation removes the heat source away from the coffee beans, preventing overheating while maintaining a compact overall structure through strategic component distribution.
Solution Approach 2:
Instead of placing the motor in the traditional vertical position below the grinding mechanism, the design relocates it to the upper horizontal space within the housing. This dimensional repositioning in the vertical axis creates thermal separation while preserving structural compactness.
2Productivity
If ground coffee is retained in the grinder between extractions, then the grinder is efficient, but the ground coffee loses volatiles and becomes stale
Solution Approach 1:
The grinder incorporates an integrated scale that automatically measures the ground coffee dosage and provides feedback to stop the grinding process at the precise moment the target dose is achieved. This self-regulating mechanism eliminates the need for manual timing and prevents both under-dosing and over-retention of ground coffee, maintaining freshness while ensuring consistent dosing.
Solution Approach 2:
The scale provides real-time weight feedback during the grinding process, allowing the system to automatically terminate grinding when the predetermined dose is reached. This closed-loop feedback control ensures that ground coffee is dispensed immediately after grinding without unnecessary retention, preserving volatile compounds and flavor quality.
3Manufacturing precision
If the grinder produces fine ground coffee, then the extraction quality improves, but the ground coffee clumps and becomes suspended in the grinder
Solution Approach 1:
The design implements a vertical discharge chute that directs ground coffee downward in a gravity-assisted flow path. This vertical dimensionality change in the discharge mechanism prevents ground coffee from lingering in horizontal spaces where it would clump and suspend, facilitating immediate ejection of fine grounds while maintaining extraction quality.
4Speed
If the motor runs at high power for frequent use, then the grinding speed increases, but the motor and burrs overheat
Solution Approach 1:
The motor is extracted from the heat-prone area directly below the burrs and positioned in the upper housing portion. This spatial extraction separates the heat-generating motor from the ground coffee and burrs, allowing high-power operation at high speeds without transferring excessive heat to the coffee processing area.
Solution Approach 2:
The housing structure acts as a thermal intermediary and insulator between the motor and the coffee processing area. This intermediate structure allows the motor to operate at high power and speed while preventing direct heat transfer to the burrs and ground coffee, managing thermal loads effectively.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Significantly reduces coffee bean retention, ensures consistent dosing, and prevents overheating, resulting in improved coffee extraction quality and flavor consistency.
Implementation Method 1
a conical burr grinder arranged to grind the coffee beans dispensed through the second aperture of the first container
Implementation Method 2
conical burr grinder arranged to grind the coffee beans
Implementation Method 3
the positioning of the motor within the first container is such that there is an evenly distributed weight of the coffee beans retained within the first container on the conical burr grinder
Implementation Method 4
a heat extraction assembly to manage temperature
Implementation Method 5
heat extraction assembly to manage temperature
Data Source
AI summary
An apparatus for grinding coffee beans having a hopper arranged to receive and dispense coffee beans. The coffee grinder also includes a conical burr arranged to grind the coffee beans dispensed by the hopper. The apparatus may be employed to grind roasted coffee beans for use in a coffee extraction (conventional coffee machines), for example in a cafe.